1. FLIP YOUR ROUTINE

When it comes to her workouts, Kate Hudson likes to switch things up – whether she's hitting the tennis court or running the streets of New York City. That's smart thinking. Cross-training – or alternating different fitness regimens – works different muscles so you don't overwork or injure them. It also prevents burnout caused by doing the same old routine, so you'll be more motivated to get moving. Get tips from Health.com on how to add variety to your workout! – Serena Kappes